1516561656163 has 16 divisors (see below), whose sum is σ = 1552785759360. Its totient is φ = 1480637223936.

The previous prime is 1516561656161. The next prime is 1516561656187. The reversal of 1516561656163 is 3616561656151.

It is a cyclic number.

It is not a de Polignac number, because 1516561656163 - 2¹ = 1516561656161 is a prime.

It is a super-2 number, since 2×1516561656163² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1516561656163.

It is not an unprimeable number, because it can be changed into a prime (1516561656161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8803803 + ... + 8974411.

It is an arithmetic number, because the mean of its divisors is an integer number (97049109960).

Almost surely, 2^{1516561656163} is an apocalyptic number.

1516561656163 is a deficient number, since it is larger than the sum of its proper divisors (36224103197).

1516561656163 is a wasteful number, since it uses less digits than its factorization.

1516561656163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171486.

The product of its digits is 2916000, while the sum is 52.

The spelling of 1516561656163 in words is "one trillion, five hundred sixteen billion, five hundred sixty-one million, six hundred fifty-six thousand, one hundred sixty-three".